Do they stick to a magnet? I would be less concerned with aluminum pieces. I haven't rebuilt a M-B transmission, but would expect most "hard parts" in the drive-train to be steel. Wear of gears and steel clutch plates would be as tiny particles that stick to the magnet in the pan as "fuzz". If those are steel, I would expect from sheet-metal pieces like a roller bearing cage or thrust washer. Anyway, since not affecting operation, just note in your maintenance book and keep driving.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans